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Microchip Technology AT97SC3205T-H3M4C-10
- Part No.:
- AT97SC3205T-H3M4C-10
- Manufacturer:
- Microchip Technology
- Category:
- Application Specific Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT97SC3205T-H3M4C-10.pdf
- Description:
- FF IND I2C TPM 4X4 32VQFN UEK
- Quantity:
- Payment:
- Shipping:
Inventory:3,945
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Product details
Overview
AT97SC3205T-H3M4C-10 from Microchip (acquired Atmel) is a TCG-compliant Trusted Platform Module (TPM) 1.2 security IC implementing hardware-based asymmetric cryptography, FIPS-140-2 certified RNG/AES/SHA/RSA engines, and 2066-byte NV user storage. It operates at 3.3V with I²C interface (400kHz Fast Mode), targeting secure boot and platform authentication in industrial embedded systems.
For engineers reviewing the AT97SC3205T-H3M4C-10 datasheet, AT97SC3205T-H3M4C-10 pinout, AT97SC3205T-H3M4C-10 application, or AT97SC3205T-H3M4C-10 equivalent, key selection factors include TPM 1.2 compliance, I²C timing constraints (SM_DAT pull-up ≤800Ω, SM_CLK pull-up ≤1.5kΩ), low-power sleep recovery via TWI_Wakeup#, and dual-package support (28-pin TSSOP / 32-pad QFN).
Technical Context
The AT97SC3205T-H3M4C-10 integrates an AVR® 8-bit RISC microprocessor with dedicated crypto hardware for RSA key generation, HMAC, and SHA-1 operations. Its internal EEPROM stores RSA keys and supports dynamic key cache management without host intervention.
It implements TCG TPM 1.2 command set over I²C, includes physical security circuitry, and uses a FIPS-140-2 certified pseudo-random number generator for cryptographic entropy. The device enters automatic low-power state when idle and recovers via dual TWI_Wakeup# pins pulsed active-low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| TCG Compliance | TPM 1.2 specification compliant - enables standardized platform integrity verification and attestation workflows |
| I²C Interface Speed | 400kHz Fast Mode / 100kHz Standard Mode - requires precise pull-up resistor sizing (SM_DAT ≤800Ω, SM_CLK ≤1.5kΩ) for stable high-speed operation |
| Supply Voltage | 3.3V ±10% - mandates tight decoupling: 2200–4700pF caps <5mm from each VCC-GND pair + 0.1μF cap <10mm at VCC node |
| NV User Storage | 2066 bytes - persistent non-volatile space for custom credentials, certificates, or policy data accessible via TPM_NV_DefineSpace |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments with full functionality across thermal range |
| Crypto Certification | FIPS-140-2 Level 2 certified - validates RNG, HMAC, AES, SHA, and RSA engines meet NIST security requirements |
| Package Options | 28-pin Thin TSSOP (4.4×9.7mm, 0.65mm pitch) or 32-pad QFN (4.0×4.0mm, 0.40mm pitch) - both RoHS-compliant and lead-free |
Pinout & Package
AT97SC3205T-H3M4C-10 is offered in two RoHS-compliant packages: 28-pin Thin TSSOP (4.40mm × 9.70mm body, 0.65mm pitch) and 32-pad QFN (4.00mm × 4.00mm body, 0.40mm pitch). Both packages feature exposed thermal pads tied to GND internally (QFN center pad) and include NC pins for layout flexibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power Supply Input | 3.3V main supply requiring localized decoupling (2200–4700pF <5mm to adjacent GND) for noise immunity and reliability |
| GND | System Ground Reference | Reference plane for all analog/digital circuits; QFN center pad is internally connected to GND and may be left floating or tied externally |
| SM_DAT / SM_CLK | I²C Data / Clock | Bidirectional I²C bus lines - require external pull-ups sized per speed (800Ω/1.5kΩ for 400kHz); duty cycle near 50% improves stability |
| LRESET# | Active-Low Reset | Asynchronous reset input; minimum 2μs pulse width required; must remain asserted until VCC stabilizes at power-up |
| PP/GPIO | Physical Presence Indicator | Hardware-controlled GPIO with internal pull-down; signals physical presence assertion (active-high) for TPM administrative commands |
| TWI_Wakeup# | Low-Power Recovery | Dual-pin wake mechanism - both pins must be pulsed low to exit deep sleep mode initiated by TPM_DeepSleep command |
| GPIO-Express-00 | Predefined NV Index GPIO | Maps to TPM_NV_INDEX_GPIO_00; internal pull-up enabled; default input mode; floats if unused |
| PIRQ# | Interrupt Request Output | Open-drain interrupt signal to host processor; indicates pending TPM events; tie to GND via 4.7kΩ if unused |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Asymmetric Crypto Engine | Offloads RSA key generation, signing, and encryption from host CPU - reduces firmware attack surface and accelerates attestation |
| FIPS-140-2 Certified RNG | Validated entropy source meeting NIST SP 800-90A - ensures cryptographically secure key material for TPM and system use |
| Internal EEPROM Key Storage | Secure on-die storage for multiple RSA key pairs - eliminates need for external secure memory and prevents key extraction |
| Dynamic Key Cache Management | Automatic SRAM-based key caching with TPM_FlushSpecific/TPM_LoadKey2 handling - no host software overhead for key lifecycle |
| Low-Power Deep Sleep Mode | Automatically entered during idle; recoverable only via dual TWI_Wakeup# pulses - extends battery life in portable/embedded platforms |
Applications
| Server Platform Integrity | Industrial Control Authentication |
|---|---|
Use Scenario: Verifying BIOS/firmware integrity during server boot and enabling remote attestation of runtime configuration. IC Role / Device Role / Timing Role: TPM 1.2 root-of-trust IC performing SHA-1 hashing of boot components and storing PCR values in protected registers. Use Value: Prevents unauthorized firmware modification and provides cryptographic proof of platform state to remote verifiers. | Use Scenario: Securing firmware updates and operator access in PLCs and HMIs deployed in factory automation networks. IC Role / Device Role / Timing Role: Hardware-enforced credential storage and signature verification for signed update packages and login tokens. Use Value: Mitigates supply-chain tampering and ensures only authorized personnel can modify control logic or parameters. |
| Embedded Device Identity | Secure Bootloader Binding |
Use Scenario: Assigning unique, unclonable identities to IoT edge gateways for TLS client certificate enrollment and zero-touch provisioning. IC Role / Device Role / Timing Role: Secure key generation and storage engine providing private keys for X.509 certificate issuance and ECDH key exchange. Use Value: Enables scalable, certificate-based device identity without exposing private keys to host software or external storage. | Use Scenario: Binding bootloader images to hardware during manufacturing to prevent execution of unsigned or modified code. IC Role / Device Role / Timing Role: Cryptographic co-processor verifying digital signatures on bootloader binaries using pre-provisioned public keys stored in NV space. Use Value: Enforces chain-of-trust from ROM to OS, blocking persistent malware and unauthorized firmware forks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TPM 1.2 security module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST33TPHF2Xx (STMicroelectronics) | TPM 1.2 + optional TPM 2.0 firmware upgradability; 3.3V I²C; 2048-byte NV storage; same industrial temp range | Supports future TPM 2.0 migration path; different pinout (32-QFN only); requires ST-specific firmware stack | Select when roadmap includes TPM 2.0 transition and vendor lock-in to ST ecosystem is acceptable |
| Infineon SLB9670 | TPM 1.2 compliant; 3.3V I²C; 2048-byte NV storage; FIPS-140-2 Level 2 certified; 32-QFN package only | No TSSOP option; different GPIO mapping (no PP/GPIO dual-role pin); requires Infineon TPM driver stack | Select when QFN-only layout is acceptable and Infineon's long-term automotive-grade availability is prioritized |
Compared with ST33TPHF2Xx and SLB9670, the AT97SC3205T-H3M4C-10 offers dual-package flexibility (TSSOP/QFN), explicit PP/GPIO hardware presence signaling, and Atmel-specific deep-sleep recovery via dual TWI_Wakeup# pins - advantageous for space-constrained industrial designs needing physical presence enforcement and ultra-low standby power.
Availability
AT97SC3205T-H3M4C-10 is available at Aetrix Electronics and suitable for industrial control systems, secure server platforms, embedded device identity provisioning, and trusted boot implementations requiring stable component supply across extended temperature ranges.
Supply support for AT97SC3205T-H3M4C-10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains its security IC portfolio. Atmel was a pioneer in embedded security, known for AVR microcontrollers and TPM solutions.
The AT97SC3205T-H3M4C-10 belongs to Atmel's TPM 1.2 product line, designed specifically for hardware-rooted trust in resource-constrained embedded systems requiring FIPS-certified crypto acceleration and platform attestation.
FAQ
What is the operating voltage range for the AT97SC3205T-H3M4C-10?
The AT97SC3205T-H3M4C-10 operates at a nominal supply voltage of 3.3V with ±10% tolerance (2.97V to 3.63V). Stable operation requires strict decoupling: 2200–4700pF capacitors placed within 5mm of each VCC–GND pair, plus a 0.1μF capacitor located within 10mm of the VCC node. Exceeding voltage limits risks permanent damage or cryptographic failure.
Does the AT97SC3205T-H3M4C-10 support TPM 2.0?
No, the AT97SC3205T-H3M4C-10 implements only the Trusted Computing Group (TCG) TPM 1.2 specification. It does not support TPM 2.0 commands, algorithms (e.g., SHA-256, ECC), or hierarchical key structures. Migration to TPM 2.0 requires a hardware replacement such as the ST33TPHF2Xx or Infineon SLB9670 with firmware upgrade capability.
How is low-power sleep mode exited on the AT97SC3205T-H3M4C-10?
The AT97SC3205T-H3M4C-10 exits low-power sleep mode only when both TWI_Wakeup# pins (TSSOP pins 7 & 22, QFN pins 7 & 22) are pulsed active-low. This dual-pin requirement prevents accidental wake events. The device automatically enters sleep when idle; no host command is needed to initiate it, but TPM_DeepSleep must be issued to enter the deepest power state.
What is the purpose of the PP/GPIO pin on the AT97SC3205T-H3M4C-10?
The PP/GPIO pin on the AT97SC3205T-H3M4C-10 serves as a hardware Physical Presence indicator - active-high signal used to authorize sensitive TPM administrative commands (e.g., clearing ownership, disabling dictionary attacks). When configured as GPIO, it has an internal pull-down resistor and defaults to input mode. Leaving it floating is acceptable if unused.
Can the AT97SC3205T-H3M4C-10 be used in automotive applications?
No - the AT97SC3205T-H3M4C-10 is specified for commercial (0°C to 70°C) and industrial (−40°C to +85°C) temperature ranges but is not qualified for automotive AEC-Q100 standards. Atmel explicitly states its products are not intended for automotive applications unless designated as automotive-grade, and this part carries no such designation. Use in safety-critical vehicle systems is prohibited without written consent from Microchip.
AT97SC3205T-H3M4C-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Trusted Platform Module (TPM)
- Core Processor:
- AVR
- Program Memory Type:
- EEPROM
- Controller Series:
- -
- RAM Size:
- -
- Interface:
- I2C
- Number of I/O:
- 4
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
AT97SC3205T-H3M4C-10 FAQ
1.How can I place an order for AT97SC3205T-H3M4C-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT97SC3205T-H3M4C-10 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT97SC3205T-H3M4C-10 reliable?
The price and inventory of AT97SC3205T-H3M4C-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT97SC3205T-H3M4C-10 is usually 5 days.
3.What payment methods are accepted for AT97SC3205T-H3M4C-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT97SC3205T-H3M4C-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT97SC3205T-H3M4C-10?
AT97SC3205T-H3M4C-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT97SC3205T-H3M4C-10 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT97SC3205T-H3M4C-10?
For technical support, including AT97SC3205T-H3M4C-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT97SC3205T-H3M4C-10 requirements.
6.How does Aetrix verify that AT97SC3205T-H3M4C-10 is sourced from the original manufacturer or authorized distributors?
All AT97SC3205T-H3M4C-10 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT97SC3205T-H3M4C-10 meets industry standards.
7.What is the process for return or replacement of AT97SC3205T-H3M4C-10?
All AT97SC3205T-H3M4C-10 units undergo pre-shipment inspection (PSI). If there is an issue with AT97SC3205T-H3M4C-10, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT97SC3205T-H3M4C-10 part is unused and in its original packaging.
Return procedure for AT97SC3205T-H3M4C-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT97SC3205T-H3M4C-10 Tags
-
CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
-
SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
-
AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
-
SLB9672AU20FW1613XTMA1
Infineon Technologies
-
SLB9673AU20FW2613XTMA1
Infineon Technologies
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